5 Key Maintenance Tips for Keeping Your Transport Refrigeration in Top Shape

Transport refrigeration units are critical for maintaining the cold chain and protecting temperature-sensitive cargo. Regular maintenance ensures reliable operation and prevents costly cargo losses.

1. Regular Coil Cleaning

Condenser and evaporator coils accumulate dirt, debris, and road grime, reducing heat transfer efficiency.

Cleaning Schedule:

• Condenser coils: Every 30 days or 500 engine hours
• Evaporator coils: Every 90 days or 1,500 engine hours
• More frequent cleaning in dusty environments

Cleaning Process:

1. Turn off the unit and disconnect power
2. Remove guards and covers
3. Use compressed air or coil cleaner
4. Rinse with water if using chemical cleaners
5. Allow to dry completely before reassembly

2. Check and Maintain Proper Refrigerant Levels

Low refrigerant levels reduce cooling capacity and can damage the compressor.

Signs of Refrigerant Issues:

• Poor cooling performance
• Frost buildup on coils
• Excessive energy consumption
• Compressor short cycling

Professional Service Required:

Refrigerant service requires EPA certification. Contact Big Rig Fixer for:

• Leak detection and repair
• Refrigerant recovery and recycling
• System recharging
• Pressure testing

3. Inspect and Replace Air Filters

Clogged air filters restrict airflow, forcing the system to work harder and potentially causing ice buildup.

Filter Maintenance:

• Check filters every 30 days
• Replace when dirty or damaged
• Use OEM or equivalent filters
• Keep spare filters in inventory

4. Monitor and Maintain Electrical Connections

Loose or corroded electrical connections can cause system failures and safety hazards.

Monthly Electrical Inspection:

• Check all connections for tightness
• Look for signs of corrosion or burning
• Test control functions
• Verify proper grounding
• Check fuse and relay condition

5. Perform Regular Belt and Hose Inspections

Belts and hoses are wear items that can fail without warning, causing system shutdown.

Belt Inspection Points:

• Proper tension (deflection test)
• Cracking or fraying
• Glazing or hardening
• Pulley alignment

Hose Inspection Points:

• Cracking or swelling
• Loose or damaged clamps
• Signs of refrigerant leaks
• Proper routing and support

Additional Maintenance Tips

Temperature Monitoring

• Calibrate temperature sensors regularly
• Test alarm systems monthly
• Document temperature logs
• Verify set point accuracy

Pre-Trip Inspections

• Check fluid levels
• Test operation before loading
• Verify door seals
• Check for unusual sounds

Professional Service Recommendations

While routine maintenance can be performed by qualified technicians, certain services require professional expertise:

• Annual comprehensive inspections
• Refrigerant system service
• Compressor repairs
• Electrical system troubleshooting
• EPA compliance documentation

Partner with Big Rig Fixer for comprehensive transport refrigeration maintenance and keep your cold chain intact.